CN103086549A - Wastewater deep processing method - Google Patents
Wastewater deep processing method Download PDFInfo
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- CN103086549A CN103086549A CN2011103392650A CN201110339265A CN103086549A CN 103086549 A CN103086549 A CN 103086549A CN 2011103392650 A CN2011103392650 A CN 2011103392650A CN 201110339265 A CN201110339265 A CN 201110339265A CN 103086549 A CN103086549 A CN 103086549A
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Abstract
The invention relates to an industrial reverse osmosis membrane device pollutant online extraction and analysis method. The invention belongs to the field of membrane-method sewage deep processing and recycling method. The method comprises the steps that: a commercial reverse osmosis membrane is used for manufacturing a lateral line membrane assembly which serves as a key pollutant extraction carrier; the lateral line membrane assembly is connected in parallel into an industrial reverse osmosis membrane device; lateral line membrane assembly water-access valve opening degree is adjusted, such that inlet water membrane-surface flow velocity is controlled; during an operation process, lateral line membrane assembly water production variation is recorded with timed frequency; when water production is reduced by 50-95% relative to an initial water production, the polluted reverse osmosis membrane reaches an analysis requirement; the polluted reverse osmosis membrane is fetched and is subjected to pollutant observation and analysis; acid and alkali are respectively used for soaking and washing the polluted reverse osmosis membrane; and contents of specific pollutants in the washing liquid are detected. The method provided by the invention has high practicality. With the method, original industrial membrane assembly and operation conditions are not damaged, and reverse osmosis membrane pollution cause can be rapidly searched. Therefore, a good technical prospect is provided for long-term stable operation of actual industrial membrane devices.
Description
Technical field
The present invention relates to a kind for the treatment of process of trade effluent, relate in particular to the deep treatment method of the waste water of oil refining factory effluent after the above biochemical treatment of two-stage.
Background technology
Petrochemical industry is China process water rich and influential family, and water withdrawal accounts for 5% of whole nation industry water intaking total amount, is one of the national five large water consumptions of assert and emphasis water saving industry.Therefore, significantly reduce water intaking and the total amount of pollutants discharged of Refineries in Sinopec, not only can effectively solve Sinopec Eleventh Five-Year Development Plan shortage of water resources and environmental protection capacity restriction problem, and can be enterprise and create economic benefit, social benefit and environmental benefit preferably.
Advanced treatment of wastewater and reuse are one of enterprise's key measures of significantly realizing water-saving and emission-reducing, and by the water-saving and emission-reducing project implementation, Sinopec processing ton crude oil in 2007 is on average fetched water and blowdown is down to respectively and is about 0.8 t and 0.5t.Particularly adopt membrane technique to carry out advanced treatment to waste water up to standard, reverse osmosis water outlet is as the de-salted water moisturizing, and Sinopec has more than ten enterprise's successful operations at present, reaches the effect of water saving.
Along with the aggravation that China water pollutes, country and locally formulated stricter sewage drainage standard, and strengthened law enforcement dynamics, in most area sewage, emission request COD concentration is lower than 60mg/L, and a lot of enterprises all face the problem that sewage can not qualified discharge.Along with enterprise water saving project implementation, the minimizing of quantity of wastewater effluent, the problem that the dense water after water saving can not qualified discharge also becomes increasingly conspicuous.
The refinery water complicated component, it is the composite waste of the multiple pollutants such as a kind of sulfur-bearing, oil, salt, alkali, phenol, cyanogen, benzene, paraffin, sulphur, organonitrogen, usually also can add the high molecular polymers such as oxidation inhibitor, pour point depressant in oil refining process, this all brings larger difficulty to wastewater treatment.Adopt materialization and the biochemical treatment process that combines for the processing of refinery water at present, process combination such as oil removal, flotation, A/O, precipitation is passed through the above biochemical treatment of two-stage usually to the various places emission standard more.Biochemical treatment causes the pollutent major part in waste water to be hard-degraded substance for a long time, and larger to Ecotoxicology, biodegradability is poor.
The disclosed refinery water microorganism of Chinese patent 200610096359.9 deep treatment method, still adopt traditional biological treatment Refinery Wastewater, as previously mentioned, general refinery water all passes through the above biochemical treatment of two-stage, process the residence time over three days, have even reach a week more than, processed waste water has not had biodegradability, then to adopt biotechnology to process be obviously impracticable.
In view of the above problems, we explore relevant technical combinations at expectation, can realize on the one hand the reuse of refinery water, solve simultaneously the dense water problems embrane method reuse process from the source.
Summary of the invention
The technical problem to be solved in the present invention:
The invention provides a kind of deep treatment method of refining oil the water outlet that factory effluent produces after the above biochemical treatment of two-stage.This wastewater organic pollutant concentration is low and biodegradability is poor, has simultaneously certain salts contg, must carry out desalting treatment to it in order to ensure the steady running of circulating water system after reuse.Namely process by fiber filter, efficiently catalyzing and oxidizing, Buffer Pool, accurate filter and electro-adsorption desalination combination process, effectively remove oil, COD and salt in the oil refining factory effluent, produce water and be back to use circulating cooling make-up water, concentrated water discharge.
The advanced treatment of waste water of the present invention is achieved in that
A kind of deep treatment method of waste water comprises the steps:
(1) waste water is sent in fabric filter filtered, purpose is to remove part oil and particulate matter.
(2) water outlet after filtering enters the efficiently catalyzing and oxidizing reactor for oxidation reactions, and the purpose of this step is to degrade and filters organic pollutant after water outlet.
(3) water outlet after oxidizing reaction enters Buffer Pool, stops at least one hour in Buffer Pool.
(4) water outlet after acidification reaction enters in accurate filter and filters, and further reduces the suspended substance in waste water.
(5) water outlet through secondary filter enters the electro-adsorption module, carries out obtaining to produce water after electro-adsorption is processed.This step purpose is desalination and removes organic pollutant.
Described electro-adsorption technological process is not added any medicament, discharges dense water ingredient all from former water, does not have the thickening problem of former water COD, and dense water can directly discharge.Produce water and can be back to use circulating cooling make-up water.
Described waste water is the product water of oil refining factory effluent after the above biochemical treatment of two-stage.
The COD of described waste water is 60 ~ 100mg/L, and oleaginousness is 0 ~ 5mg/L, and specific conductivity is 1400 ~ 5000 μ S/cm.
The filtration medium of described fabric filter is bundle fiber, and filter type is lower to stream, and filtering velocity is 25 ~ 40m/h.
The backwash cycle of described fabric filter is 6 times/week, and the backwash time is 10 ~ 30min, once adds alkali immersion backwash in every two months, and alkali used is 96% solid alkali, and soak time is 24 ~ 36h.
The oxygenant of described oxidizing reaction is ozone, and the concentration of ozone in waste water is 5 ~ 15mg/L, and oxidization time is 10-30 minute.
Described oxidation reaction process uses catalyzer to be copper catalyst.Copper catalyst is take porous material and part rare-earth substance as matrix, the catalyzer that forms with the oxide compound double sintering of copper.
This catalyzer is cellular, and the honeycomb aperture is 5mm ~ 15mm, and the specific surface area ratio is 30 ~ 100cm
2/ g.Large 3 ~ 10 times than traditional similar spherical catalyst of this specific surface areas of catalyst, mass transfer effect improves a lot, and the catalyzed oxidation effect strengthens.
Be matrix with the porous materials such as diatomite, porous silicate and pure aluminium silicate and part rare-earth substance, be prepared into work in-process through mix and blend, ball milling, extruding, high temperature sintering becomes composite material carrier, then becomes copper catalyst with metal oxide double sinterings such as cupric oxide.
The loading height of described catalyzer in catalyst oxidation reactor is 1/3 ~ 1/2 of the empty body of reactor.
Be provided with interlock acid adding device in described Buffer Pool, when the waste water total alkalinity that enters Buffer Pool during higher than 150mg/L, interlock acid adding device starts add acidic solution in waste water, and the total alkalinity of waste water is reduced to below 150mg/L.
Described acidic solution is 30%(wt) sulphuric acid soln.
The filtering accuracy of described accurate filter is 5 ~ 10 microns.
Described accurate filter is cartridge filter.
The voltage of electro-adsorption module is 1.5 ~ 3.5V.
Described adsorption module electrode is noble electrode.
The present invention is directed to the water quality characteristics of waste water, adopt fiber filter+efficiently catalyzing and oxidizing+Buffer Pool+secondary filter+electro-adsorption technical finesse waste water.At first, remove part oil and suspended substance in waste water by fiber filter, then adopt the efficiently catalyzing and oxidizing technology that Organic Pollutants in Wastewater concentration is further reduced, the catalyzed oxidation used catalyst is cellular, oxidation surpasses 40% to the clearance of Organic Pollutants in Wastewater, make catalyzed oxidation produce water COD less than 60mg/L, satisfy the circulating cooling make-up water requirement; Then, adopt electro-adsorption to remove the salinity more than 70% in waste water, make conductivity indices reach the circulating cooling make-up water requirement, produce the water direct reuse to circulating cooling make-up water, concentrated water discharge.
The invention has the beneficial effects as follows:
By method provided by the invention, waste water is through after fiber filter+efficiently catalyzing and oxidizing+Buffer Pool+secondary filter+electro-adsorption art breading, and final outflow water COD, produces water and is back to use circulating cooling make-up water lower than 1200 μ S/cm less than 60mg/L, specific conductivity, dense water COD can directly discharge lower than 60mg/L.efficiently catalyzing and oxidizing in this process combination is due to the cellular treatment catalyst of filling in catalyst oxidation reactor, improve on traditional spheroidal treatment catalyst basis, strengthened the catalyzed oxidation mass transfer effect, further strengthened the oxidizing reaction effect, the effective degraded of efficiently catalyzing and oxidizing technique to wastewater organic pollutant, the dense water of electro-adsorption technique combines to the not concentrated characteristics of organic pollutant, compare with traditional desalinating process, this process combination has realized reuse of wastewater on the one hand, solved simultaneously the trouble and worry of dense water treatment, and this technical process is simple, workable, be worthy to be popularized.
Description of drawings
Fig. 1 is the process flow sheet of advanced waste treatment method of the present invention.
Embodiment
Embodiment 1
Three grades of fields of certain sewage from oil refinery bio-chemical effluent, waste water quality is characterized as COD 78mg/L, specific conductivity 2016 μ S/cm, oily 1.64mg/L, turbidity 5.71NTU, BOD
50mg/L, total alkalinity 98.1mg/L.This waste water is done following processing, referring to Fig. 1:
The water outlet from monitoring pool of this waste water of step 1 is squeezed into fabric filter through sump pump, and in strainer, filtration medium is bundle fiber, and lower to flowing through filter, filtering velocity is 30m/h.The conventional backwash cycle is 6 times/week, and the backwash time is 30min.Once added alkali in every two months and soak backwash, alkali is 96% solid alkali, soaks 24 hours.Under this operational condition, the water outlet oil-containing 0.9mg/L of fabric filter, turbidity 1.67NTU, COD and specific conductivity do not change;
The water outlet of step 2 fabric filter enters the efficiently catalyzing and oxidizing reactor, the cellular treatment catalyst of filling in reactor.This catalyzer is prepared into work in-process take the porous materials such as diatomite, porous silicate and pure aluminium silicate and part rare-earth substance as matrix through mix and blend, ball milling, extruding, then high temperature sintering becomes composite material carrier, then the copper catalyst that becomes with the cupric oxide double sintering.Specific surface area of catalyst is 30cm
2/ g.Catalyzer is hierarchal arrangement in reactor, and loadings is 1/3rd places of reactor height overall.Operational condition is: oxidization time is 10 minutes, passes into ozone in this water outlet, and concentration is 10mg/L.Under this operational condition, produce water COD 50mg/L;
The water outlet of step 3 efficiently catalyzing and oxidizing reactor enters Buffer Pool, and waste water stopped in Buffer Pool 1 hour.
The water that stops after 1 hour in the step 4 Buffer Pool enters cartridge filter, and the strainer filtering accuracy is 5 microns.Under this operational condition, produce water turbidity less than 1NTU.
The water outlet of step 5 cartridge filter enters the electro-adsorption module.The electro-adsorption voltage control is at 1.5V, and the electro-adsorption module electrodes is noble electrode.Under this operational condition, producing water conductivity is 400 μ S/cm, and COD is 38mg/L, can be back to use circulating cooling make-up water.Dense water COD 50mg/L can directly discharge.
Embodiment 2
Certain sewage from oil refinery field secondary biochemical effluent, waste water quality is characterized as COD90mg/L, specific conductivity 2800 μ S/cm, oily 5.2mg/L, turbidity 6.5NTU, BOD
50mg/L, total alkalinity 140mg/L.This waste water is done following processing:
This waste water of step 1 is squeezed into fabric filter through pump, and in strainer, filtration medium is bundle fiber, and lower to flowing through filter, filtering velocity is 25m/h.The conventional backwash cycle is 6 times/week, and the backwash time is 30min.Once added alkali in every two months and soak backwash, alkali is 96% solid alkali, soaks 30 hours.Under this operational condition, produce water oil 0.5mg/L, turbidity 2.0NTU, COD and specific conductivity do not change;
The water outlet of step 2 fiber filter enters the efficiently catalyzing and oxidizing reactor, the cellular treatment catalyst of filling in reactor.This catalyzer is prepared into work in-process take the porous materials such as diatomite, porous silicate and pure aluminium silicate and part rare-earth substance as matrix through mix and blend, ball milling, extruding, then high temperature sintering becomes composite material carrier, then the copper catalyst that becomes with the cupric oxide double sintering.Specific surface area of catalyst is 100cm
2/ g.Catalytic amount is 1/3rd places of reactor height overall.Operational condition is: oxidization time is 30 minutes, and in waste water, ozone concn is 5mg/L.Under this operational condition, produce water COD 55mg/L;
The water outlet of step 3 efficiently catalyzing and oxidizing enters Buffer Pool, due to total alkalinity higher than 150mg/L, acid adding device in Buffer Pool starts and adds that acidic solution-30%(wt) sulphuric acid soln drops to below 150mg/L total alkalinity in the Buffer Pool, waste water stops 1 hour in Buffer Pool after, enter cartridge filter, the strainer filtering accuracy is 10 microns.Under this operational condition, produce water turbidity less than 1NTU.
The described accurate filter water outlet of step 4 enters the electro-adsorption module.The electro-adsorption voltage control is at 3.5V, and the electro-adsorption module electrodes is noble electrode.Under this operational condition, producing water conductivity is 840 μ S/cm, and COD is 40mg/L, can be back to use circulating cooling make-up water.Dense water COD 55mg/L can directly discharge.
Embodiment 3
Certain refinery adopts the dense water after membrane technique is processed waste water, and the COD of this dense water is 100mg/L, and oleaginousness is 5mg/L, and specific conductivity is 5000 μ S/cm.Oil 1.64mg/L, turbidity 5.71NTU, BOD
50mg/L, total alkalinity 98.1mg/L.This waste water is done following processing:
This waste water of step 1 is squeezed into fabric filter through sump pump, and in strainer, filtration medium is bundle fiber, and lower to flowing through filter, filtering velocity is 40m/h.The conventional backwash cycle is 6 times/week, and the backwash time is 30min.Once added alkali in every two months and soak backwash, alkali is 96% solid alkali, soaks 36 hours.Under this operational condition, the water outlet oil-containing 0.9mg/L of fabric filter, turbidity 1.67NTU, COD and specific conductivity do not change;
The water outlet of step 2 fabric filter enters the efficiently catalyzing and oxidizing reactor, the cellular treatment catalyst of filling in reactor.This catalyzer is prepared into work in-process take the porous materials such as diatomite, porous silicate and pure aluminium silicate and part rare-earth substance as matrix through mix and blend, ball milling, extruding, then high temperature sintering becomes composite material carrier, then the copper catalyst that becomes with the cupric oxide double sintering.Specific surface area of catalyst is 50cm
2/ g.Catalyzer is hierarchal arrangement in reactor, and loadings is 1/3rd places of reactor height overall.Operational condition is: oxidization time is 20 minutes, passes into ozone in this water outlet, and concentration is 15mg/L.Under this operational condition, produce water COD 50mg/L;
The water outlet of step 3 efficiently catalyzing and oxidizing reactor enters Buffer Pool, and waste water stopped in Buffer Pool 1.5 hours.
The water that stops after 1.5 hours in the step 4 Buffer Pool enters cartridge filter, and the strainer filtering accuracy is 8 microns.Under this operational condition, produce water turbidity less than 1NTU.
The water outlet of step 5 cartridge filter enters the electro-adsorption module.The electro-adsorption voltage control is at 2.5V, and the electro-adsorption module electrodes is noble electrode.Under this operational condition, producing water conductivity is 400 μ S/cm, and COD is 38mg/L, can be back to use circulating cooling make-up water.Dense water COD 50mg/L can directly discharge.
Although disclose for the purpose of illustration specific embodiments of the invention and accompanying drawing, its purpose is help to understand content of the present invention and implement according to this, but it will be appreciated by those skilled in the art that: without departing from the spirit and scope of the invention and the appended claims, various replacements, variation and modification are all possible.Therefore, the present invention should not be limited to most preferred embodiment and the disclosed content of accompanying drawing, and the scope of protection of present invention is as the criterion with the scope that claims define.
Claims (10)
1. an advanced waste treatment method, comprise the steps:
(1) waste water is sent in fabric filter filtered;
(2) water outlet after filtering enters catalyst oxidation reactor and carries out oxidizing reaction;
(3) water outlet after oxidizing reaction enters Buffer Pool, stops at least one hour in Buffer Pool;
(4) water outlet of Buffer Pool enters in accurate filter and filters;
(5) water outlet through secondary filter enters the electro-adsorption module, carries out obtaining to produce water after electro-adsorption is processed.
2. advanced waste treatment method according to claim 1, is characterized in that, described waste water is the product water of oil refining factory effluent after the above biochemical treatment of two-stage.
3. advanced waste treatment method according to claim 1, is characterized in that, the filtration medium of described fabric filter is bundle fiber, and filter type is lower to stream, and filtering velocity is 25 ~ 40m/h.
4. advanced waste treatment method according to claim 1, is characterized in that, the oxygenant of described oxidizing reaction is ozone, and the concentration of ozone in waste water is 5 ~ 15mg/L, and oxidization time is 10-30 minute, and the catalyzer of described oxidizing reaction is copper catalyst.
5. advanced waste treatment method according to claim 4, is characterized in that, the catalyzer of described oxidizing reaction is honeycombed catalyst, and the honeycomb aperture is 5mm ~ 15mm, and the specific surface area ratio is 30 ~ 100cm
2/ g.
6. according to claim 1 or the 4 or 5 described advanced waste treatment methods of any one, is characterized in that, the loading height of described catalyzer in catalyst oxidation reactor is 1/3 ~ 1/2 of the empty body of reactor.
7. advanced waste treatment method according to claim 1, is characterized in that, during higher than 150mg/L, the interlock acid adding device that arranges in Buffer Pool adds acidic solution in waste water when the waste water total alkalinity that enters Buffer Pool.
8. advanced waste treatment method according to claim 7, is characterized in that, described acidic solution is sulphuric acid soln.
9. advanced waste treatment method according to claim 1, is characterized in that, the filtering accuracy of described accurate filter is 5 ~ 10 microns.
10. advanced waste treatment method according to claim 1, is characterized in that, the voltage of electro-adsorption module is 1.5 ~ 3.5V; The electrode of electro-adsorption module is noble electrode.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108314231A (en) * | 2018-01-29 | 2018-07-24 | 北京桑德环境工程有限公司 | A kind of industrial park advanced treatment of wastewater and the system and method for reuse |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1785854A (en) * | 2005-10-27 | 2006-06-14 | 武汉科技学院 | Treatment and reuse method of high temperature dyeing waste water |
| JP2006224064A (en) * | 2005-02-21 | 2006-08-31 | Yanmar Co Ltd | Wastewater purification system |
| CN101723526A (en) * | 2008-10-24 | 2010-06-09 | 中国石油化工股份有限公司 | Film treatment method for wastewater produced by synthetic rubber |
| CN102120663A (en) * | 2011-03-29 | 2011-07-13 | 北京惟泰安全设备有限公司 | Coking wastewater advanced treatment system and process |
-
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- 2011-11-01 CN CN201110339265.0A patent/CN103086549B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006224064A (en) * | 2005-02-21 | 2006-08-31 | Yanmar Co Ltd | Wastewater purification system |
| CN1785854A (en) * | 2005-10-27 | 2006-06-14 | 武汉科技学院 | Treatment and reuse method of high temperature dyeing waste water |
| CN101723526A (en) * | 2008-10-24 | 2010-06-09 | 中国石油化工股份有限公司 | Film treatment method for wastewater produced by synthetic rubber |
| CN102120663A (en) * | 2011-03-29 | 2011-07-13 | 北京惟泰安全设备有限公司 | Coking wastewater advanced treatment system and process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108314231A (en) * | 2018-01-29 | 2018-07-24 | 北京桑德环境工程有限公司 | A kind of industrial park advanced treatment of wastewater and the system and method for reuse |
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